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1·There was 75.75% increase on chemical oxygen demand (COD).

生化耗氧量养殖初、末期相比较升高了75.75%；

2·The oxygen demand is usually measured for Marine biological experiments.

在海洋生物实验中，常常需要测量生物的需要氧量。

3·Chemical Oxygen Demand (COD) is the representative index of sewage water.

化学需氧量(简称COD)是水质污染程度的代表性指标。

4·Chemical oxygen demand discharges: 30.3 billion tonnes (44% from agriculture).

化学需氧量：303亿吨(44%来自农业)。

5·Chemical oxygen demand is one of the important parameter in water monitoring.

化学需氧量是水质监测的一个重要参数。

6·Temperature had an evident influence on chemical oxygen demand (COD) removal.

温度对系统COD去除能力有着比较明显的影响。

7·Biochemical oxygen demand (BOD) is one of the most important indexes in water monitoring.

生化需氧量(BOD)是水质监测中最重要的指标之一。

8·The two methods used for measuring standard samples and all sewage biochemical oxygen demand.

用上述两种方法测定标准样品、各种污水的生化需氧量进行差异性比较。

9·The heavy demands of her job; the emotional demands of his marriage; an increased oxygen demand.

她工作的高强度要求；他婚姻上的情感要求；增长的氧气需求。

10·The reduction of myocardial oxygen demand is beneficial for patients with coronary heart disease.

降低心肌氧耗，有利于冠心病患者术中维持心肌供氧与需氧之间的平衡。

需氧量

1·Chemical oxygen demand is an integrative index for evaluating the degrees of organic pollution in water, and is also one of the important parameters in water monitoring.

化学需氧量是评价水体有机污染程度的综合指标，也是水质监测的一个重要参数。

2·Biochemical oxygen demand (BOD) is one of the most important indexes in water monitoring.

生化需氧量(BOD)是水质监测中最重要的指标之一。

3·Chemical oxygen demand (COD) is a synthetical indicator which represents the degree of organic pollution in water.

化学需氧量(COD)是表征水体中有机物污染程度的一个综合性指标。

4·The result indicated that the main pollution target of this section is permanganate index, five days' biochemical oxygen demand and ammonia nitrogen.

评价结果表明：该段主要污染指标高锰酸盐指数、五日生化需氧量、氨氮。

5·The current scope of major pollutants includes sulfur dioxide and chemical oxygen demand, a gauge of water pollution.

现在主要污染物的范围包括二氧化硫和化学需氧量，为一个衡量水污染程度的指标。